ESM 266: Passive microwave remote sensing. Jeff Dozier. Frequency-wavelength relation. Generally in the microwave part of the spectrum we use frequency instead of wavelength Typically measured in s –1 , called Hertz (Hz) Most often Gigahertz (GHz) = 10 9 Hz. Microwave band codes.
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Planck radiation at20,000 GHz is 36,000greater than at 37 GHz,so pixels at lower frequenciesmust be bigger
Sea ice, 18 Jan 2003
Motion vectors, 10hrs
Earth-viewing side brightness temperatureAqua Prior to Launch
(photos by Bill Ingalls)
Humidity Sounder for Brazil (HSB)
Atmospheric Infrared Sounder (AIRS)
Advanced Microwave Sounding Unit (AMSU; two units)
Launch of a radiosonde
a. Data from all 2378 AIRS infrared channels for one footprint off the west coast of South Africa, June 13, 2002, 1:30 UTC.
500 1000 1500 2000 2500 wavenumber (cm-1)
20 10 6.7 5 4 wavelength (m)
b. Detail showing the leftmost 128 of the 2378 channels in plot a.
AMSU Ch. 2 (31.4 GHz)
AMSU Ch. 3 (50.3 GHz)
AMSU Ch. 4 (52.8 GHz)
AMSU Ch. 5 (53.94 GHz)
HSB Ch. 2 (150 GHz)
HSB Ch. 3 (183±1 GHz)
HSB Ch. 4 (183±3 GHz)
HSB Ch. 5 (183±7 GHz)
South central U.S.
HSB 150 GHz data
AIRS Visible/Near IR data
(images courtesy of the AIRS Science Team)
Surface Conditions from AMSU
Moisture Streams from HSB
(image courtesy of NASDA)
AMSR-E image, 2:26 a.m. Japan Standard Time (JST).
TMI Total Rainfall
AMSR-E Total Rainfall
(images courtesy of Chris Kummerow and Bob Adler)
Ice extent deviations from the Nimbus 7 SMMR and DMSP SSMI
(extended from Parkinson et al., 1999)